void namebuf_add_dir (namebuf_t buf, const char *name);
char *namebuf_finish (namebuf_t buf);
-char *tar_getcwd (void);
+const char *tar_getcwd (void);
/* Represent N using a signed integer I such that (uintmax_t) I == N.
With a good optimizing compiler, this is equivalent to (intmax_t) i